3,2
a(p^2)=0 for p=4k-1
M. Klin, V. A. Liskovets and R. Poeschel, Analytical enumeration of circulant graphs with prime-squared vertices, Sem. Lotharingien de Combin., B36d, 1996, 36 pages.
Cf. A038786, A061846.
Sequence in context: A192059 A191419 A054373 * A164790 A037448 A011470
Adjacent sequences: A061844 A061845 A061846 * A061848 A061849 A061850
nonn
Valery A. Liskovets (liskov(AT)im.bas-net.by), May 09 2001